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What type of stainless steel is used for NEMA 4/4X/5 stainless steel safety switches?

Type 304 stainless steel is used as standard on Square D NEMA 4/4X/5 stainless steel Safety Switches. Type 316 stainless steel is available, however. See the Square D on-line Digest for more details (click on the link below, then click on the e-catalog link, then click on Browse the Digest, then click on Section 3 Safety Switches. Look for the Special Application switches in the table of contents).